Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5395510 | Efficient preparation of blackened steel strip | Sachiko Suzuki, Nobuo Totsuka, Takao Kurisu, Keizo Okuno, Yoshihiro Naruse | 1995-03-07 |
| 5389436 | Surface-treated metal sheet which excels in workability, electrical conductivity and corrosion resistance, and method of producing the same | Nobuo Totsuka, Masaki Mabuchi, Yoshihiro Naruse | 1995-02-14 |
| 4997529 | Electrolytic process and apparatus for forming pattern on surface of metallic object | Nobuo Totsuka, Takao Kurisu | 1991-03-05 |
| 4935111 | Method for producing black colored steel strip | Sachiko Suzuki, Nobuo Totsuka, Takao Kurisu | 1990-06-19 |